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Finding the Fourth Proportional to 3,210.76, 4,430.17 and 1,866.62

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Solution

The fourth proportional to 3,210.76, 4,430.17 and 1,866.62 is: 2,575.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,210.76 : 4,430.17 = 1,866.62 : x
  2. Step 2: Convert to fraction form
    3,210.76/4,430.17 = 1,866.62/x
  3. Step 3: Cross multiply
    3,210.76x = 4,430.17 × 1,866.62
  4. Step 4: Simplify right side
    3,210.76x = 8,269,443.93
  5. Step 5: Solve for x
    x = 8,269,443.93/3,210.76
  6. Step 6: Final answer
    x = 2,575.54

Related Problems

Find fourth proportional to 1,605.38, 2,215.09 and 933.31
Half scale
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Double scale
Find fourth proportional to 3,211.76, 4,431.55 and 1,867.62
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.